Ssu-2000E Upper Front Panel Connections - Symmetricom SSU-2000e User Manual

Figure 1-7.

SSU-2000e Upper Front Panel Connections

The SSU-2000e main shelf contains the following connection features:
Three groups of Clock input connectors – each group of nine Clock input
connectors (9-pin, Micro-D female) is associated with a specific Input module
slot.
Three groups of 20 output connectors – each group of 20 outputs connect
through internal summing circuits to two Output modules. In the event of the
failure of one module, the second module continues supplying output signals.
The first module can be electrically disconnected from the output circuitry with
relays activated by the software.
Dual set of power terminals and dual set of grounding lugs – for connecting
external power and grounding to the SSU-2000e system.
Three communications ports – two serial port connections, Serial Port-A and
Serial Port-B, and one RJ-45 ethernet connector (10-base-T). Another serial
communication port, Serial Port-C, is available on the front of the
Communications module.
DTE/DCE switch – this slide switch (S1) allows the user to select either data
terminal equipment (DTE – default, PC connection) or data communication
equipment (DCE – modem connection) type of serial port interface for SERIAL
PORT-A and SERIAL PORT-B. The right position is labeled A and the left
position is labeled B.
Local and remote alarm connectors – each 15-pin Micro-D female connector
is electrically connected to the relays on the Communications module.
Two antenna connectors – for attaching radio receiver antennas.
12713140-002-2 Revision E – October 2006
Chapter 1 Product Overview
System Components
SSU-2000e User's Guide 33